Equity and Earnings Per Share - Weighted Average Number of Common and Common Equivalent Shares Used in Calculation of Basic and Diluted Earnings Per Share (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Weighted-average common shares outstanding (used in the calculation of basic earnings per share)	807,038,086	823,974,421	810,881,047	823,671,664
Potential dilution from stock options, warrants and restricted stock and stock units	2,185,965	3,926,840	2,423,093	4,029,606
Weighted-average common and common equivalent shares (used in the calculation of diluted earnings per share)	809,224,051	827,901,261	813,304,140	827,701,270
Antidilutive stock options excluded from the calculation of diluted earnings per share	1,441,300	4,554,859	1,441,300	4,544,859